ISO INTERNATIONAL STANDARD 14403-1 First edition 2012-07-15 Water quality Determination of total cyanide and free cyanide using flow analysis (FIA and CFA) - Part 1: Method using flow injection analysis (FIA) Qualité de I'eau - Dosage des cyanures totaux et des cyanures libres par analyse en flux (FIA et CFA) - Partie 1: Méthode par analyse avec injection de flux (FIA) Reference number ISO 14403-1:2012(E) ISO @ISO2012 ted without license from IHS Not for Resale ISO 14403-1:2012(E) COPYRiGHTPROTECTEDDOCUMENT ISO2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland Copynoht dieatioa organzatintor tandadizain @ ISO 2012 - All rights reserved or networking permited without license from IHS Not for Resale ISO 14403-1:2012(E) Contents Page Foreword ..iv Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Interferences... 4.1 Interferences by oxidizing agents.. 4.2 Interferences by sulfide, sulfite, nitrite, and carbonyl compounds 4.3 Other interferences... 5 Principle... 5.1 Determination of total cyanide. 5.2 Determination of free cyanide.. 6 Reagents 3 7 Apparatus 8 Sampling and sample preparation.. 6 9 Procedure.. 9.1 Flow system set-up.... 9.2 Reagent blank measurement 9.3 Checking the suitability of the flow system 9.4 Calibration... 9.5 Sample measurement. 10 Calculation 9 11 Expression of results .9 12 Test report 9 AnnexA (informative)Examplesofflowsystems 10 Annex B (normative) Determination of the real cyanide concentration in the potassium cyanide solution (6.18.1).. Annex C (informative) Performance data, 12 Bibliography 14 ili ed without license from IHS Not for Resale